You can use the Admin Setting APTS_DisableCartAsyncNotification to turn off the email notifications you receive after completion of any async operation such as cart finalization and pricing in every type of quote or agreement. In the Split quote or agreement, the notification for cart splitting is also disabled along with finalization and pricing. If you enabled the Progress Tracker on the quote or agreement page to monitor the progress of all the async operations, email notifications are redundant and you can use this feature to avoid them.